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Old February 28th, 2011, 08:16 AM   #1
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IR filter AND polarizer?

Hello,
I need to use a polarizer for an upcoming water shoot. My EX1 lives with it's IR filter on. Should I stack the filters or drop the IR when using the polarizer? Thanks!
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Old February 28th, 2011, 08:53 AM   #2
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Re: IR filter AND polarizer?

As a rule the less glass in front of the lens the better.I take my IR off if I require another type of filter.
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Old March 1st, 2011, 06:26 AM   #3
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Re: IR filter AND polarizer?

Ditto, I don't have the IR on unless I need it.
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Old March 1st, 2011, 12:19 PM   #4
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Re: IR filter AND polarizer?

When would you not want an IR on? I guess I shoot a lot of people with black shirts, but I never take it off.
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Old March 1st, 2011, 02:36 PM   #5
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Re: IR filter AND polarizer?

I can film most jobs without it, and unless there's a situation where there are multiple black and the colours are all different I'll leave it off. It loses light too, over a stop I expect.

We shoot in a clothing store a couple of times a month with mixed lighting. Roof fluorescent, some daylight, Arri MSRs and Coollights LEDs and fluorescents.

We watch every shot while setting up, occasionally there's a black fabric that causes the IR problem, but it's quite luckily rare. And it always seems the MSRs are the source which makes it worse, probably because they have such a high CRI whereas the Coollights stuff has less red at source.
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Old March 1st, 2011, 03:30 PM   #6
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Re: IR filter AND polarizer?

Quote:
Originally Posted by Annen James View Post
When would you not want an IR on? I guess I shoot a lot of people with black shirts, but I never take it off.
It's only blacks where man made fibres are used. It's important to have the IR filter to hand but I only put it on when I need it.

I do however leave a UV filter on at all times (except if I am using another filter). I'd rather scratch or damage that than the EX1 glass.
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Old March 1st, 2011, 08:55 PM   #7
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Re: IR filter AND polarizer?

Marcus - what UV filter do you use?
thanks, Malcolm
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Old March 2nd, 2011, 02:01 AM   #8
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Re: IR filter AND polarizer?

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Marcus - what UV filter do you use?
thanks, Malcolm
It's a Tiffen.
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Old March 2nd, 2011, 09:51 AM   #9
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Re: IR filter AND polarizer?

Thanks very much. I think I'd better get one (it was on my wishlist, but I'd forgotten until I saw this thread).
Regards, Malcolm
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Old March 2nd, 2011, 02:42 PM   #10
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Re: IR filter AND polarizer?

You'd be amazed how much crap collects on the UV filter. When you keep in mind that all this would be going onto your expensive lens it's a no-brainer.

But you do need to keep it clean. Very clean. Also watch out for reflections when there are bright light sources.
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